Woronoff's ring
Woronoff's Ring
Woronoff's ring (pronunciation: /wɔːrɒnɒfz rɪŋ/) is a medical term referring to a pale, circular area that appears around a psoriasis lesion after treatment with psoralen and ultraviolet A (PUVA) therapy.
Etymology
The term is named after the Russian dermatologist, Leonid Woronoff, who first described this phenomenon in the early 20th century.
Description
Woronoff's ring is a temporary phenomenon that typically disappears within a few days. It is believed to be caused by the release of certain inflammatory substances from the psoriasis lesion, which then inhibit the inflammation in the surrounding skin.
The appearance of Woronoff's ring is often a sign that the psoriasis treatment is working, as it usually appears after the psoriasis lesions have started to improve. However, it is not seen in all patients undergoing PUVA therapy for psoriasis.
Related Terms
- Psoriasis: A chronic skin condition characterized by red, scaly patches of skin.
- Psoralen: A type of medication used in PUVA therapy to make the skin more sensitive to ultraviolet light.
- PUVA therapy: A type of treatment for psoriasis and other skin conditions, which involves taking psoralen medication and then exposing the skin to ultraviolet A light.
- Inflammation: The body's response to injury or infection, characterized by redness, warmth, swelling, and pain.
External links
- Medical encyclopedia article on Woronoff's ring
- Wikipedia's article - Woronoff's ring
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